Police take action as protesters attempt to stop traffic entering DSEI on 9 September 2017. Photograph: Barritt/Rex/Shutterstock. Wednesday 13 September 2017 Last modified on Wednesday 13 September 2017 10.06 EDT. The mayor of London, Sadiq Khan, has been urged to pass on the cost of policing the world’s biggest arms fair to its organisers, with more than 100 protesters arrested so far. More than £1.1m was spent deploying police officers to counter protests at the last Defence and Security Equipment International (DSEI) fair in 2015, according to figures released to Siân Berry, the Green party’s London assembly member. The number of police officer deployments for the 2015 event was 2,245, a... Full story